Yes — according to the consensus (ijmāʿ) of scholars, denying the obligation of Salah (prayer) takes a person out of the fold of Islam, because it is a clear and established command from Allah ﷻ and His Messenger ﷺ.
📖 Evidence from the Qur’an and Sunnah
Allah ﷻ says:
“Indeed, prayer has been decreed upon the believers a decree of specified times.” (Surah An-Nisa, 4:103)
And the Prophet ﷺ said:
“The covenant that distinguishes between us and them (the disbelievers) is the prayer; whoever abandons it has disbelieved.” (Tirmidhi, Ibn Majah)
💡 Important Distinction
If a person denies that Salah is obligatory — claiming it is not required — this is kufr (disbelief) because it rejects something known by necessity in Islam.
However, if a person believes Salah is obligatory but neglects it out of laziness or weakness, most scholars say they are still Muslim but committing a major sin, while some scholars view persistent neglect as disbelief.
🌿 In Summary
Denying the obligation of Salah = disbelief (kufr).
Neglecting it out of laziness = grave sin, but not necessarily kufr according to the majority.
Muslims should repent, return to prayer, and seek Allah’s mercy — for Salah is the pillar of the religion and the first act to be accounted for on the Day of Judgment.
“Between a person and disbelief is abandoning the prayer.” – (Sahih Muslim)